E-Paper ESP32 Driver Board

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E-Paper ESP32 Driver Board
E-Paper-ESP32-Driver-Board-1.jpg

Universal e-Paper Driver HAT, supports various Waveshare SPI e-Paper raw panels
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Introduction

Universal e-Paper Driver HAT, Onboard ESP32, supports various Waveshare SPI interface e-Paper raw panels. Supports refreshing image to e-paper via WIFI or Bluetooth. It also supports Arduino.

More

Parameter

  • WiFi Standard: 802.11b/g/n
  • Communication Interface: SPI
  • Bluetooth Standard: 4.2, BR/EDR and BLE included
  • Communication Interface: 3-Wire SPI, 4-wire SPI (default)
  • Working voltage: 5V
  • Working Current: 50mA-150mA
  • Outline dimension: 29.46mm x 48.25mm

Pin

Pin ESP32 Description
VCC 3.3V Power input
GND GND Power ground
SCK P13 SPI CLK, Clock Signal Input
DIN P14 SPI MOSI, Data Input
CS P15 Chip Select, active-low
BUSY P25 Busy Output Pin (means busy)
RST P26 Reset, active-low
DC P27 Reset, Data/Demand, low level means to demand, high level means data

PS: The above is the board fixed connection, no additional operation by the user

Feature

  • Onboard ESP32, support Arduino development
  • Provide Android mobile APP program, which can update the display content through Bluetooth EDR, easy to use
  • Provide HTML host computer program, which can remotely update the display content through the web page, which is convenient to integrate into various network applications
  • Supports Floyd-Steinberg dithering algorithm for more color combinations and better shadow of the original image
  • Supports many common image formats (BMP, JPEG, GIF, PNG, etc.)
  • Factory built-in e-ink screen driver (open source)
  • 5V pin supports 3.6V to 5.5V voltage input, can be powered by lithium battery
  • Provide complete supporting information manual

Application

This product cooperates with the ink screen and is suitable for the application scenario of wireless brushing.

  • Supermarket electronic price tag
  • Electronic name card
  • Serial information display board, etc.

Preparation

Hardware Connection

This product is shipped with an ESP32 network driver board, an adapter board, and an FFC extension cable.
When using it, you can directly connect the screen to the driver board, or connect it through extension cables and adapter boards.
Direct access to the driver board:
Esp32001.jpg
Access via extension cord:
Esp32002.jpg

  • Set the mode switch: Set the No. 1 switch according to the model of the EPD used. There are many screens. If it is not listed, please use 'A' to try. If the display effect is poor or cannot be driven, please try switching the switch.

Esp32 pre003.jpg

Bluetooth Examples

Bluetooth Demo

Download example

  • Go to the Loader_esp32bt directory, double click the Loader_esp32bt.ino file to open the example.
  • Choose Tools->Boards->ESP32 Dev Module and select the correct Port according to Device Manager: Tools->Port

Epd esp32 bluetooth 1.png

  • Click the Upload icon to build the project and upload it to the ESP32 driver board.
  • Install the APP to the Android board and open it：

Epd esp32 bluetooth 2.jpg

  • APP has five buttons on the main page:
    • BLUETOOTH CONNECTION: This button is used to connect the ESP32 device via Bluetooth.
    • SELECT DISPLAY TYPE: This button is used to select the type of display according to what you buy.
    • LOAD IMAGE FILE: Click it and choose a picture to open. It is only available after choosing the display type.
    • SELECT IMAGE FILTER: This button is used to choose the image process method.
    • UPLOAD IMAGE: Upload the processed image to ESP32 driver board and update to e-Paper display.
  • Please first open the Bluetooth function of your phone. Click the BLUETOOTH CONNECTION button -> Click the SCAN icon on the top-right to scan the Bluetooth device.
  • Find the ESP32 device and connect. If your phone is the first time to connect this device, it requires pairing, complete the pairing process according to the prompt. (Note: The APP cannot work with pairing.)
  • Click "SELECT DISPLAY TYPE" to choose the display type.
  • Click "LOAD IMAGE FILE" To choose a picture from your phone and cut it.
  • Click " SELECT IMAGE FILTER" to choose a process algorithm and confirm.
    • "LEVEL: MONO": This option will process the picture to a monochrome image.
    • "LEVEL" COLOR": This option will process the picture to the tricolor image according to the display colors of the display (only valid for colorful displays).
    • "DITHERING: MONO": This option will process the picture to a monochrome image.
    • "DITHERING: COLOR": This option will process the picture to the tricolor image according to the display colors of the display (only valid for colorful displays).
  • Click "UPLOAD IMAGE" to upload the image to the ESP32 device and display it.

WiFi Examples

WiFi Demo

How to Use

  • Go to the Loader_esp32wf directory, double click Loader_esp32wf.ino file to open the project.
  • Choose Tools->Boards->ESP32 Dev Module in IDE menu, and select the correct COM port:Tools->Port

Epd esp32 wifi 1.png

  • Open the srvr.h file, modify the ssid and password to your actual WiFi used.

Epd esp32 wifi 2.png

  • Click the Upload icon to build the project and upload it to the ESP32 driver board.
  • Open the serial monitor, set the baud rate to 115200. Then you can get the information printed like the IP of the ESP32 board.

Epd esp32 wifi 3.png

  • Open a browser on the PC or mobile phone (Note that you should connect your PC/Phone to the same network as the ESP32 board), go to the webpage with the IP address of the ESP32 board:

Epd esp32 wifi 4.png

  • There are five areas in the webpage：
    • Image Operation：
      Select Image file: Click the option to choose a picture from PC/phone

Level: mono: Black/White image level processing.
Level: color: Colorful image level processing (only valid for colorful display)
Dithering: mono: Black/White image Dithering processing
Dithering: color: Colorful image Dithering processing (only valid for colorful display)
Update image: Upload image to ESP32 board and display it.

    • IP Information: In this are, the IP information of the ESP32 board connected is listed.
    • Image Size Setting: x and y is the beginning position on the image. For example, if you select an image with 800x480 resolution, and the display you connect is the 2.13. The 2.13inch display cannot display the whole picture, the codes will crop the picture according to the resolution of displays. If you set the x and y, the codes will set the (x, y) as the being pixel where it starts to crop. w and h is the resolution of the displays choose.

Note: If you modify the x and y value, you need to click the Level or Dithering options to process the image again.

    • Display Type: You should first select the display size here according to the display used.
    • Image Preview: it will display the original image selected and the image processed.
    • PS: The upload progress value is printed at the bottom of the webpage when uploading.

For examples:

  • In area ① click Select image file to choose a picture, you can also drag the picture to the Original image area directly.
  • In area ④ choose the type according to the display, for example 1.54b
  • In area ① choose an algorithm to process the image, for example Dithering: color
  • In area ① click Upload image to upload the image and display.

Epd esp32 wifi 5.png

Offline Examples

Local Demo

Download example

  • Go to examples\ directory. copy the whole esp32-waveshare-epd folder to [Installation directory of Arduino IDE]\hardware\espressif\esp32\libraries

Epd esp32 example 1.png

  • Open the Arduino IDE, Find the wareshare-e-Paper examples from File->Example, and select one according to the display type.

Epd esp32 example 2.png

  • Click Upload to build the project and upload it to the ESP32 board. You can open the Serial Monitor to check the debug information.

Resources

Documentation

Demo Code

Related Resources

This is a post in Arduino Form about our SPI e-Paper thanks to ZinggJM, maybe you want to refer to.

FAQ

Question:If you don't have a V2 logo on the back of your 2.13inch e-paper screen, how do I use it?

 Answer:
  • Open epd1in13.h in the project and change the following value to 1

Epd2in13 esp chose.png


Question:For the new version of the ESP32 Driver Board, what are the functions of the above two DIP switches?

 Answer:
  • Set the model: Set the No. 1 switch according to the E-Paper model you are using. There are many models of the E-Paper. If the model you used is not listed, please use ‘A’ first to try.

ESP32 SWITCH.png

  • Turn on the serial port module: Turn the No. 2 switches to "ON", this switch controls the power supply of the CP2102 (USB to UART module). When you don’t need to use it, you can manually turn off the module to save power (if the No. 2 switch is in the OFF state, the device cannot upload the program)

Epd esp32 hard 30.png

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Support

Support

If you require technical support, please go to the Support page and open a ticket.

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